JP3094026U - Internal combustion engine driven by spark ignitable fuel - Google Patents

Abstract

(57) Abstract: An internal combustion engine capable of improving combustion process control in a low-temperature combustion system by a method as simple as possible. SOLUTION: An intake valve 1 and an exhaust valve 3 are provided for each cylinder of an internal combustion engine. The valve is connected via transmission means 11 in one engine operating range. The transmission means for operating at least one said exhaust valve 3 during the intake stroke comprises at least one
One mechanical eccentric member 1 acting on the first transmission member 12 comprising two mechanical first transmission members 12 and the transmission means being activated by a mechanical activation mechanism 14.
5 is provided.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention has at least one intake valve and one exhaust valve for each cylinder, Few fuel-ignitable fuels and premixed auto-ignition An internal combustion engine having at least one operating range, wherein the intake valve and the exhaust valve are At least in one engine operating range, those connected via transmission means It

[0002]

[Prior art]

  The spark-ignitable fuel referred to here is a conventional fuel with a relatively high octane number. It means fuel, for example gasoline. To determine the combustion process of an internal combustion engine The important factors are the phase position of the combustion process or the start of combustion, and the maximum cylinder pressure. Rise rate and peak pressure. Homogeneous fuel-air-air mixture self-ignition In an internal combustion engine in which combustion is basically realized, the determinants are the charge composition and charge. It is determined by control with the air temperature transition. Many of these two parameters are again Factors such as engine speed, fuel quantity, intake air temperature, charge pressure, effective compression ratio, It is determined by the inert gas content of the Linda supply air, engine member temperature, and the like.

[0003]   To control the ignition delay phase and the rate of chemical phenomena that naturally progress during the combustion itself It has been found that a particularly important role can be attributed to the supply air temperature. Increase air supply temperature A very effective way to increase the residual gas content is to increase the Remained unscavenged in the previous combustion cycle during cylinder charge for Kuru It is to increase the rate of exhaust.

[0004]   Austrian Utility Model Publication No. 003135U1 has at least one A homogeneous fuel / air-air mixture in both operating modes can be spark ignited and self-ignited An internal combustion engine that burns various fuels, especially gasoline by self-ignition . As a result, we achieved particularly favorable operation in terms of emissions in the partial load operating range. can do. The internal combustion engine raises the supply air temperature in the partial load operating range. To control the amount of residual gas for the purpose of internal exhaust gas recycling Therefore, the variable valve control device controls the engine operation parameter at the time when at least one exhaust valve is closed. It is configured to be variable according to the parameter. However, the internal exhaust Control of the residual gas content of the cycle or combustion chamber can also result in an increase of the inert gas content. And However, in order to control the combustion start and the maximum combustion rate independently of each other, It would be necessary to control the inert gas content independently of the temperature demand.

[0005]   Exhaust gas recycling of diesel engines from US Pat. No. 5,546,914 Devices are known, which reduce the amount of exhaust gas during the exhaust stroke to return to the intake system. It has an auxiliary device that activates at least one intake valve. In this case, control The control system is hydraulic and has one pump piston and one working piston. However, these pistons are connected to each other via one hydraulic chamber. Po The pump piston is the rocker arm of the exhaust valve, and the working piston is the rocker arm of the intake valve. The pump piston, which is connected to the Hydraulic pressure acts on the working piston, which acts on the intake valve to open it. Exercise in the direction. Of the hydraulic chamber via one solenoid valve forming this auxiliary device The hydraulic pressure is kept stable, which keeps the intake valve in the open position during the exhaust stroke. And This achieves internal exhaust gas recycling, with the exhaust gas in the intake path The air is cooled down to the intake phase. In this known system, exhaust cooling is Desired to improve product efficiency and NOx emissions.

[0006]   However, low temperature combustion systems such as the so-called HCCI method (Homogenous Charg e Compression Ignition: Self-ignition of a homogeneous thin mixture in the combustion chamber In an internal combustion engine operated by the method of burning with fire) In this case, it is recycled because it is used for control at the time of ignition by the control. The exhaust is preferably hot.

[0007]   From US Pat. No. 5,603,292 at least one intake valve and one exhaust A valve actuation mechanism for an internal combustion engine having a valve is known. Intake and exhaust valves are separate It is driven by a camshaft via one rocker arm. One exhaust valve Both can be opened during the opening stroke of the intake valve via the mechanical transmission means. This transmission means Has one rotary arm in each of the intake valve locker and exhaust valve locker areas. It is composed of one shaft. The rocker arm of the intake valve is connected to the exhaust valve via this shaft. It acts on the rocker arm of and moves it in the opening direction. In this way the exhaust path Internal exhaust gas recycle can be achieved even if the pressure ratio to the intake path is not suitable. Wear. This transmission means is a hydraulic actuating mechanism that moves the shaft in the axial direction. Is switched to an operating state or a non-operating state. However, for this hydraulic operation A relatively high cost is required in terms of structure and control technology.

[0008]

[Problems to be solved by the device]

  Therefore, the purpose of the present invention is to make combustion in a low temperature combustion system as simple as possible. An object of the present invention is to provide an internal combustion engine capable of improving process control.

[0009]

[Means for Solving the Problems]

  In order to solve the above problems, at least one intake valve and one exhaust valve are provided for each cylinder. Has a valve and is operated by fuel that can be ignited by sparks and by premixed auto-ignition Has at least one operating range, the intake valve and the exhaust valve being less According to the present invention, both connected via transmission means in one engine operating range In an internal combustion engine, the transmission means comprises at least one mechanical first transmission member, At least one said exhaust valve is operated by said transmission means during an intake stroke, And the transmission means is activated by a mechanical actuation mechanism, and the actuation mechanism is It is provided with one eccentric member that acts on the first transmission member.

[0010]   At least one exhaust valve and one intake valve during the intake stroke by the transmission means Will be connected and operated at the same time, and a certain amount of high temperature exhaust will be discharged from the exhaust system. Returned into the cylinder, which raises the charge air temperature as desired. Saiden The selection of the actuated or non-actuated state of the moving means preferably acts on one transmission member. Via one mechanical actuation mechanism with an eccentric member.

[0011]   In one particularly simple embodiment, the first transmission member is a bi-arm first rocking lever. And the first lever arm of the swing lever is an intake valve of the intake valve. The operating mechanism and the second lever arm of the swing lever are the same as the exhaust valve operating mechanism of the exhaust valve. Each of them can be mechanically connected directly or indirectly. The first rocking lever operated by the valve operating mechanism is installed in the exhaust valve operating mechanism. The exhaust valve operating mechanism in the direction of opening the exhaust valve. Special When the camshaft is arranged on the lower side, the transmission member is the intake valve operating device. It is possible to directly link the structure and the exhaust valve operating mechanism.

[0012]   On the other hand, in an internal combustion engine in which the camshaft is arranged overhead, intake valve operation is The working mechanism indirectly acts on the first transmission member via a mechanical second transmission member, The second transmission member is preferably formed as a double-arm swing lever. Is.

[0013]   Alternatively, the first transmission member may be replaced by the mechanical second transmission member. Acting indirectly on the air valve operating mechanism, the second transmission member preferably swings in the form of arms. It is also possible to configure it as a lever.

[0014]   In order to activate the transmission means, in one preferred embodiment, the first and second The transmission member is an eccentric member, and the intake valve operating mechanism or the exhaust valve operating mechanism or It is in mechanical contact with both. Also, in a particularly simple embodiment, the eccentricity The member acts on said first lever via a lever rotation axis, preferably the first lever Rotates about the lever rotation shaft arranged on the eccentric member.

[0015]

[Embodiment of device]

  Hereinafter, the present invention will be described in detail with reference to the drawings. Functionally identical in the examples The same reference numerals are given to the parts.

[0016]   The intake valve 1 is through the intake valve operating mechanism 2, and the exhaust valve 3 is through the exhaust valve operating mechanism 4. Each can be operated. In one embodiment shown in FIGS. 1 and 2, intake air The valve operating mechanism 2 includes an intake valve rocker 5, an intake valve tappet 6 and an intake valve / camshaft. The exhaust valve operating mechanism 4 includes an exhaust valve rocker 8, an exhaust valve tappet 9 and an exhaust valve tappet 9. And the exhaust valve / camshaft 10. 3 and 4 are intake valves Overhead intakes that act directly on the rocker 5 or the exhaust valve rocker 8. Other embodiments with air valve / camshaft or exhaust valve / camshaft 7, 10 Is shown. Intermediate parts 21 to 22 are intake valve rocker 5 or exhaust valve It is fixedly connected to the cover 8. Valve rockers 5 and 8 are rocker arm or dragleba May be formed as

[0017]   At least the combustion of a homogeneous gasoline / air-air mixture is initiated by self-ignition. Also in one engine operating range, the intake valve 1 and the exhaust valve 3 are the power transmitters during the intake phase. As a result of being connected to each other by the stage 11, the exhaust valve 3 is connected to the intake valve 1 during the intake stroke. At the same time, it is opened. When the exhaust valve 3 is opened, a certain amount of high temperature exhaust gas is discharged from the exhaust system. Returned to Linda. During ignition due to the rise in temperature of cylinder air supply The points and the combustion process can be controlled.

[0018]   The transmission means 11 has a first mechanical transmission member 12, which is a first lever arm. First arm-like rocking lever 1 having arm 13a and second lever arm 13b It is composed of three. Switching the transmission means 11 between an operating state and a non-operating state Therefore, one eccentric member (here, an eccentric ring) 15 that can rotate around the shaft 20 is provided. An operating mechanism 14 is provided, and the eccentric wheel 15 causes the first lever 13 to intake air. It is brought into mechanical contact with the valve operating mechanism 2. This is because the first transmission member 12 operates the intake valve. It is carried out by moving in the direction of the mechanism 2 and the exhaust valve operating mechanism 4. Biography When the moving means 11 is activated, the first lever 13 moves onto the intermediate parts 21 to 22. It is placed so that any movement of the intermediate part 21 is transmitted directly to the first lever 13. And is further transmitted to the intermediate part 22 via this lever, in which case the first lever is The -13 rotates around a lever rotation shaft 16 arranged on the eccentric wheel 15. Figure Reference numeral 1 shows the transmission means 11 in the operating state, and FIG. 2 shows the transmission means in the non-operating state. The moving means 11 is shown.

[0019]   In the embodiment shown in FIGS. 3 and 4, the intake valve operating mechanism 2 is a mechanical second transmission part. It indirectly acts on the first transmission member 12 via the material 17. This second transmission member It is formed by a two-arm-shaped second swing lever 19 that swings around the bar rotation shaft 18. The first lever arm 19a of the second swing lever 19 is connected to the intermediate part 21 and the machine. And the second lever arm 19b is connected to the first lever arm 1 of the first lever 13. It is mechanically connected to 3a. Therefore, the first and second transmission members 12 and 17 are in series. Can be connected. Of the first transmission member 12 (transmission means 11) shown in FIG. In the actuated state, the intake valve rocker 5 engages the second lever 19 via the intermediate piece 21. Use and exercise this. The second lever 19 transmits this movement to the first lever 13. Then, this lever further exhausts the above-mentioned motion through the intermediate part 22 and the exhaust valve rocker 8. Transmit to valve 3. FIG. 4 shows the first non-operating state when the eccentric member 15 is driven. 1 shows the transmission member 12 (transmission means 11).

[0020]   Although not shown, the first transmission member 12 is a mechanical second transmission member. The exhaust valve operating mechanism 4 may be configured to indirectly act via the The second transmission member is preferably formed as a two-armed rocking lever.

[0021]   FIG. 5 shows the relationship between the valve stroke h of the intake valve 1 and the exhaust valve 3 and the crank angle CA. It's lamb. The valve stroke curve of the intake valve 1 is shown in Fig. 1A, and the valve straw of the exhaust valve 3 is The black curve is shown in Fig. 3A. The exhaust phase is marked with the number O and the intake phase is marked with the number I There is. During the intake phase I, the exhaust valve 3 is connected between the activation start point A and the activation end point B. Basically, it is released in synchronization with. The transmission means 1 is shown by a dotted line in FIG. 3 is a valve stroke curve of the exhaust valve 3 when 1 is not operating. Curve 3a is intake It is an example of a second opening valve stroke curve of the exhaust valve 3 in the process of phase I. It

[0022]   The transmission means 11 makes it simple and flexible without the need for an external energy device. It is possible to achieve internal exhaust gas recirculation from the exhaust system that can be controlled appropriately.

[0023]   In addition, in order to make symmetry with the drawing convenient in the section of the utility model registration claim Although the reference numeral is entered, the present invention is not limited to the structure shown in the accompanying drawings. Absent.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a valve control device in an operating state in a first embodiment of an internal combustion engine according to the present invention.

FIG. 2 is a schematic diagram showing a valve control device in a non-actuated state as compared with FIG.

FIG. 3 is a schematic view showing a valve control device in an operating state in a second embodiment of an internal combustion engine according to the present invention.

FIG. 4 is a schematic diagram showing a valve control device in a non-actuated state as compared with FIG.

FIG. 5 is a graph showing the relationship between valve stroke and crank angle.

[Explanation of symbols]

1 intake valve 2 Intake valve operating mechanism 3 exhaust valve 4 Exhaust valve operation mechanism 11 Transmission means 12 First transmission member 13 First swing lever 13a First lever arm 13b Second lever arm 14 Actuating mechanism 15 Eccentric member (eccentric ring)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI F02M 25/07 570 F02M 25/07 570L (72) Inventor Franz Kumera Austria Ar-8043 Am Lindenhof 36/17

Claims (6)

[Scope of utility model registration request] 1. At least one intake valve (1) and one exhaust valve (3) per cylinder, which is operated with spark-ignitable fuel and with premixed self-ignition. An internal combustion engine having an operating range, wherein the intake valve and the exhaust valve (1, 3) are connected via a transmission means (11) in at least one engine operating range, the transmission means (11) ) Is at least one mechanical first
A transmission member (12) for at least one during the intake stroke
Two said exhaust valves (3) are operated by said transmission means (11) and said transmission means (11) are activated by a mechanical actuation mechanism (14), said actuation mechanism (1)
4) An internal combustion engine, characterized in that it comprises one eccentric member (15) acting on the first transmission member (12). 2. The first transmission member (12) is formed by a two-arm-shaped first swing lever (13), and a first lever arm (13a) of the swing lever (13) is provided with the intake valve (1). ) The intake valve operating mechanism (2) and the second lever arm (13b) of the swing lever (13) are the exhaust valve (3).
Of the exhaust valve operating mechanism (4) can be directly or indirectly mechanically connected to each other, and by this connection, the first swing lever (13) operated by the intake valve operating mechanism (2) is an exhaust valve. The internal combustion engine according to claim 1, wherein a mechanical action is exerted on the operating mechanism (4) to operate the exhaust valve operating mechanism (4) in a direction in which the exhaust valve (3) opens. 3. The intake valve operating mechanism (2) indirectly acts on the first transmission member (12) via a mechanical second transmission member (17), the second transmission member preferably being both. Internal combustion engine according to claim 2, characterized in that it is formed as an arm-like rocking lever (19). 4. The first transmission member (12) indirectly acts on the exhaust valve operating mechanism (4) via a mechanical second transmission member, the second transmission member preferably having both arms. Internal combustion engine according to claim 1 or 2, characterized in that it is formed as a rocking lever. 5. The first and second transmission members (12, 17)
Is an intake valve operating mechanism (2) by an eccentric member (15).
The internal combustion engine according to claim 3 or 4, which is mechanically brought into contact with the exhaust valve operating mechanism (4) or both. 6. The eccentric member (15) acts on the first rocking lever (13) in the region of the lever rocking shaft (16), preferably the first rocking lever (13) being Lever swing shaft (16) provided on the eccentric member (15)
The internal combustion engine according to any one of claims 1 to 5, which rotates around.